Re-enforcing mallet for dental pluggers



(No Model.)

J. L. MEWBORN.

REINFORGING MALLET FOR DENTAL PLUGGERS. No 442,070. Patented Dec. 2,1890.

W/TA/&S: INVENTOR: J MM Q .filww Ma a/6 BY AT n/EYS UNITED STATES PATENTOFFICE.

JOSEPH L. MEWBORN, OF MEMPHIS, TENNESSEE.

RE-ENFORCING MALLET FOR DENTAL PLU GGERS.

SPECIFICATION formingpart of Letters Patent No. 44ao70, dated Dece m'ber2, 71890. 7

Application filed June 13 1890.

To all whom it may concern: I

Be it known that I, J OSEPH L. MEWBORN, of Memphis, in the county ofShelby and State of Tennessee, have invented a new and ImprovedRe-Enforcing Mallet Attachment for Mechanical Pluggers, of which thefollowing is a specification, reference being had to the annexeddrawings, forming a part thereof, in which Figure 1 is aside elevation,partly in section, of the bit-holding end of the mechanical dentalplugger, showing my improvement in place; and Fig. 2 is a perspectiveview of my improved attachment detached from the plugger.

Similar letters of reference indicate corresponding parts in bothfigures.

The object of my invention is to provide an attachment by means of whichany dental engine or mechanical plugger or mallet can be converted intoa re-enforcing mallet for application to any ordinary hand dental tool,such as is commonly used in oompressingand finishing fillings, preparingcavities, trimming teeth, or other work of like character.

My invention consists in a cup-shaped tool adapted to be inserted in amechanical plugger in place of the ordinary bit or tool used inconnection with such plngger, the said cupshaped tool being constructedto receive the end of an ordinary hand tool or plugger, all as will behereinafter more fully described.

The mechanical plugger or mallet A, to which my improvement is applied,may be of any well-known construction. To the bitholding shank C of thepluggerAis fitted the rod (t, adapted to be inserted in the end of theshank O, and held therein ,by the means usually employed for holding thebit. In the present case the rod Ct is screwed into the end of theshank, and held there by means of the nutD,screwed upon the taperingthread on the end of the shank C, the shank being split, so as totightly clamp the rod to when the nut I) is turned.

The body E of my attachment, which is attached to or formed integrallywith the rod a, consists of a tapering piece of metal provided with aconcaved or hemispherical cavity F, forming a cup for receiving the endof an ordinary hand-plugger G, or a hand-tool, chisel,

- by the'shank G of the machine-mallet.

Serial No. 355,370. (No model.)

gouge, gravel, trimmer, or burnisher. The hand-tool is grasped andcontrolled by the hand of the operator, and gold is taken up and placedin the cavity by means of the plngger. The blow for compressing thefilling is delivered by the machine-mallet A through the medium of theattachment held The attachment is placed in contact with the end of theplugger, as shown, and the rim of the cup prevents the attachmentslipping from the tool. The mechanical mallet is capable of deliveringas many as two hundred blows per minute. These re-enforce thehandpressure in the operation of plugging. It is immaterial whether themechanical plugger is axially in line with the hand-plugger, as thecavity F permits of arranging the machine-mallet at any desired anglewith reference to the hand-tool.

The advantages gained by the use of my improvement are the saving of thecost of a large number of expensive points or tools. It also saves thetime required for changing these pluggers and points a number of timesduring each operation. A great saving of time is also effected infeeding the gold to the cavity, as the hand-tool is used for conveyingthe gold to the cavity of the tooth. Thus a great gainis effected in theoperation of plugging teeth, which conduces to the comfort of both thepatient and the operator.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent 1. The combination, with a mechanical dental pluggeror mallet, of a cup-shaped attachment having an unbroken concavedsurface for receiving the ends of hand-tools,substantially as described.

2. As a new article of manufacture, a cupshaped receiver having anunbroken con caved surface for receiving the ends of hand dental tools,the said receiver being provided with ashank adapted for connection witha mechanical plugger, substantially as described.

J OSEPI'I L. MEWBORN.

Witnesses:

S. J. SHEPHERD, JAMES MAYsWELL.

